This document is a project report for the L.A.B. (Learning Arithmetic Basics) project, which aimed to improve students' mastery of basic arithmetic skills like addition, subtraction, multiplication and division. Diagnostic assessments found that students had low scores and mastery in these areas. The project used innovative teaching methods over two weeks like peer learning, simplified concepts, and practice worksheets. Summative assessments after the project showed improved scores, though further progress is still needed. The report discusses the need for the project, diagnostic and summative assessment results, and conclusions.